<template>
  <div>
    <table border="1" width="700" style="border-collapse: collapse">
      <caption>
        购物车
      </caption>
      <thead>
        <tr>
          <th>
            <input v-model="ischecked" type="checkbox" />
            <span>全选</span>
          </th>
          <th>名称</th>
          <th>价格</th>
          <th>数量</th>
          <th>总价</th>
          <th>操作</th>
        </tr>
        <add @addList="addList"></add>
        <trs
          v-for="(item, index) in goodList"
          :key="index"
          :name="item.name"
          :price="item.price"
          :num="item.num"
          :index="index"
          :checked="item.checked"
          @plus="add"
          @lose="sub"
          @check="btn"
          @delete="del"
        ></trs>
      </thead>
      <tbody></tbody>
      <tfoot>
        <hj :arr="goodList"></hj>
      </tfoot>
    </table>
  </div>
</template>

<script>
import trs from "./components/hero";
import hj from "./components/heji.vue";
import add from "./components/add.vue";
export default {
  components: {
    trs,
    hj,
    add,
  },
  data() {
    return {
      goodList: [
        {
          name: "诸葛亮",
          price: 1000,
          num: 1,
          checked: false,
        },
        {
          name: "蔡文姬",
          price: 1500,
          num: 1,
          checked: false,
        },
        {
          name: "妲己",
          price: 2000,
          num: 1,
          checked: false,
        },
        {
          name: "鲁班",
          price: 2200,
          num: 1,
          checked: false,
        },
      ],
    };
  },
  methods: {
    add(index) {
      this.goodList[index].num += 1;
    },
    sub(index) {
      if (this.goodList[index].num === 0) return;
      this.goodList[index].num -= 1;
    },
    btn(index) {
      this.goodList[index].checked = !this.goodList[index].checked;
    },
    del(index) {
      this.goodList.splice(index, 1);
    },
    addList(name, price) {
      this.goodList.push({
        name: name,
        price: price,
        num: 1,
        checked: false,
      });
    },
  },
  computed: {
    ischecked: {
      get() {
        return this.goodList.every((item) => item.checked === true);
      },
      set(val) {
        this.goodList.forEach((item) => (item.checked = val));
      },
    },
  },
};
</script>

<style></style>
